Marine radars are usually short range radars that are used by ships to pinpoint locations about other ships and land in the area.The frequencies with which these radars are operated are known as x-band or s-band frequencies.

1. MARINE RADAR

2. CONTENTS
 INTRODUCTION
 RADAR
 FACTORS AFFECTING RADAR INTERPRETATION
 MARINE RADAR USES
 REMOTE CONTROLLER
 OPERATION OFTHE MARINE RADARS
 SEARCH AND RESCUETRANSPONDER
 RADAR REFLECTORS
 OPERATIONAL OVERVIEW
 CONCLUSION

3. INTRODUCION
 A Word to the Owner of the FR-8xx2 Marine
Radar
 FURUNO Electric Company thanks you for
purchasing the FR-8xx2 series Colour LCD
Marine Radar.
 We are confident you will discover why the
FURUNO name has become synonymous
with quality and reliability

4. RADAR
 Radar is a word derived from "radio detection
and ranging".
 It is of great practical value to the navigator
in the piloting waters.
 Radars are not only used to locate
navigational aids and to perform radar
navigation, but they are also used for tracking
other vessels in the vicinity so as to avoid risk
of collision.

5. Factors Affecting Radar
Interpretation
 Radar’s value as a navigational aid depends
 on the navigator’s understanding its
characteristics and limitation.

6. MARINE RADAR USES
 Marine radars are usually short range radars that
are used by ships to pinpoint locations about
other ships and land in the area.
 The frequencies with which these radars are
operated are known as x-band or s-band
frequencies.
 The x stands for secret, as the ship radar was
mainly a hidden frequency while used for the
purpose of tracking ship during the Second
World War.
 The s stands for small range in the second type.

7. REMOTE CONTROLLER
 The optional remote controller provides
armchair control over transmit, standby, range
and display
 Press the power key at the top of the control panel to
turn the radar on, and the lamp to its left lights.
 To turn the radar off, press and hold down the
key until the screen turns black.
 At power-up, the start-up screen appears,
showing the model name, program number and
the results of the ROM and RAM check, OK or
NG (No Good)

8.  If an NG appears, try pressing any key other
than the power key to proceed. If normal
operation is not possible, contact your dealer
for advice.
 After the tests are completed, the bearing
scale and a digital timer appear.
 The digital timer counts down the time
remaining to warm up the magnetron, which
transmits the radar pulses.

9.  This warm up takes 180 sec. (FR-8252) or 90 sec. (FR-
8062, FR-8122)After the timer has counted down to
0:00, the STBY screen appears, the appearance of
which choose according to your needs.
 The radar is now ready to transmit radar pulses.
Press the STBY/TX key to transmit radar pulses.
 The STBY/TX key toggles between stand-by and
transmit status.
 The antenna rotates in transmit condition and is
stopped in standby.
 Because the magnetron ages with use it is highly
recommended to set the radar in standby

10. Operation of the Marine Radars
 There is an antenna on the top of the radar that
continuously rotates and flashes.
 The flashes actually are frequency beams that are
transmitted from the radar to find out whether there
any objects present in the path of the ship
 The frequency and the time taken by the flashes to
return (reflections) to the radar receiver of the ship
helps to find out whether the route of the boat can
be continued with or not.
 On the display screen, the reflections can be seen so
that identifying the actual distance of the objects
can be even more easy.

11. Search and Rescue Transponder
(SART)
 SART or Search and RescueTransponder, is an extremely
vital equipment on the ship as it performs the job of a
signal-man.
 SARTs are made of waterproof components which
protects it against damage by water.
 SARTs are of use in ships, lifeboats and life rafts.
 They are the most supportive machines in case of an
unprecedented emergency.
 SARTs are designed to remain afloat on water for a long
time in case the vessel finds itself submerged in water.

12.  The bright colour of SART’S enables their
quick detection, whereas the combination of
transmitter and receiver enables it to
transmit as well as receive radio signals.
 SART machines have been instrumental in
rescuing several crafts and ships by reacting
to the search signal sent from an X-band
radar, typically of 9 GHz.

13. RADAR REFLECTORS
 Marine radar reflectors are an important device
that are fitted in boats especially in today’s
times.
 when there is a constant threat of boats, ships,
and yachts entering unknown water borders.
 Boats that are made of fibreglass do not reflect
the radar pulses; this could cause unwanted
collisions between boats or with ships.
 For this reason radar reflectors are designed
specifically to help boats get located and avert
any untowardly accident.

14. ARPA
 The availability of low cost microprocessors and
the development of marine radar systems.
 Radar manufactures used this technology to
create the Automatic Radar Plotting Aids
(ARPA).
 ARPAs are computer assisted radar data
processing systems which generate predictive
vectors and other ship movement information.
 The International Maritime Organization (IMO)
amending the International Convention of Safety
of suitable automated radar plotting aids(ARPA).

15. AUTOMATIC SUPPRESSION OF SEA
AND RAIN CLUTTERS
 If neither sea clutter or rain clutter are sufficiently
suppressed in spite of adjustment of respective controls,
turn on the automatic anti clutter feature to suppress them.
 A/C AUTO appears at the top left corner when this feature
is turned on.
 Press the MENU key to open the menu.
 Choose the Echo menu and press the ENTER key.
 Choose Auto Anti Clutter and press the ENTER key.
 Choose Off or On as appropriate and press the ENTER key.
 Press the MENU key to close the menu

16. FactorsAffecting Radar
Interpretation
 Marine radars are usually short range radars that
are used by ships to pinpoint locations about
other ships and land in the area.
 The frequencies with which these radars are
operated are known as x-band or s-band
frequencies.
 The x stands for secret, as the ship radar was
mainly a hidden frequency while used for the
purpose of tracking ship during the Second
World War.
 The s stands for small range in the second type.

17. OPERATIONALOVERVIEW
 Do one of the following depending on the zoom mode in
use.
 Relative or true zoom mode
 Use the trackball to place the cursor where you want to
zoom and press the ENTER key.
 The zoom cursor is shown with solid lines and is fixed at the
location chosen. Each press of the zoom key enables or
disables the zoom cursor.
 The zoom cursor is shown with dashed lines when it is
active and solid lines when it is inactive.
 To quit zoom, press the zoom key to show the zoom cursor
with dashed lines and press the CANCEL/HLOFF key.

18. CONCLUSION
 Thus the marine radar is discussed with all
the essential requirements and they were
explained in detail.
 The marine radar is used in many ways to
detect many problems in the sea area and is
the best way in radar technology.

19. THANK
YOU